Abstract
Twelve patients (pts), ages 7 mos. to 23 yrs. (mean 11 yrs.), with known univentricular atrioventricular (AV) connection (“Single ventricle”) were evaluated by ECG-gated magnetic resonance imaging (MRI). Multiple sections were obtained in transverse, coronal and oblique planes using a 0.3T or LOT magnet and SE 30 pulsing techniques. MRI studies were evaluated using a segmental approach prior to reviewing the echocardiograms and angiograms which were available on all pts. MRI accurately depicted: 1) cardiovisceral and atrial situs 2) presence of splenic tissue 3) systemic and pulmonary venous connections 4) the mode of AV connection (i.e. absent right, double inlet, etc.) 5) the morphology and spatial relationships of the main and rudimentary ventricular chambers (6) the ventriculoarterial (VA) connections and 7) surgical procedures (i.e. shunts, PA bands). Seven pts had absent right AV connection, 4 had double inlet anatomy and 1 had an absent left AV connection. The absent AV connection was true atresia in 6 with invagination to the cardiac crux of fat-containing sulcus tissue which appears bright on MRI and an imperforate valve in 1. In 11 pts, the rudimentary chamber could be visualized. VA discordance was demonstrated in 2 pts with absent right AV connection, in all 5 with double inlet LV's and the 1 with absent left AV connection. We conclude that MRI accurately depicts cardiac morphology in pts with univentricular AV connection, often providing information not available with other imaging techniques.
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Jacobstein, M., Portman, M. & Fletcher, B. EVALUATION OF UNIVENTRICULAR ATRIOVENTRICULAR CONNECTION BY NMR IMAGING. Pediatr Res 21 (Suppl 4), 190 (1987). https://doi.org/10.1203/00006450-198704010-00146
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DOI: https://doi.org/10.1203/00006450-198704010-00146